US6847606B2 - Air-bearing slider for optical disk drive - Google Patents
Air-bearing slider for optical disk drive Download PDFInfo
- Publication number
- US6847606B2 US6847606B2 US09/835,294 US83529401A US6847606B2 US 6847606 B2 US6847606 B2 US 6847606B2 US 83529401 A US83529401 A US 83529401A US 6847606 B2 US6847606 B2 US 6847606B2
- Authority
- US
- United States
- Prior art keywords
- objective lens
- installation hole
- optical disk
- air
- slider
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Images
Classifications
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B21/00—Head arrangements not specific to the method of recording or reproducing
- G11B21/02—Driving or moving of heads
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
- G11B7/12—Heads, e.g. forming of the optical beam spot or modulation of the optical beam
- G11B7/135—Means for guiding the beam from the source to the record carrier or from the record carrier to the detector
- G11B7/1372—Lenses
- G11B7/1374—Objective lenses
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B17/00—Guiding record carriers not specifically of filamentary or web form, or of supports therefor
- G11B17/32—Maintaining desired spacing between record carrier and head, e.g. by fluid-dynamic spacing
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B21/00—Head arrangements not specific to the method of recording or reproducing
- G11B21/16—Supporting the heads; Supporting the sockets for plug-in heads
- G11B21/20—Supporting the heads; Supporting the sockets for plug-in heads while the head is in operative position but stationary or permitting minor movements to follow irregularities in surface of record carrier
- G11B21/21—Supporting the heads; Supporting the sockets for plug-in heads while the head is in operative position but stationary or permitting minor movements to follow irregularities in surface of record carrier with provision for maintaining desired spacing of head from record carrier, e.g. fluid-dynamic spacing, slider
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
- G11B7/12—Heads, e.g. forming of the optical beam spot or modulation of the optical beam
- G11B7/121—Protecting the head, e.g. against dust or impact with the record carrier
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
- G11B7/12—Heads, e.g. forming of the optical beam spot or modulation of the optical beam
- G11B7/122—Flying-type heads, e.g. analogous to Winchester type in magnetic recording
Definitions
- the present invention relates to an air bearing slider for a swing-arm type optical disk drive, and more particularly, to an air bearing slider for an optical disk drive adapted so that an objective lens can be installed stably, and dust is prevented from accumulating in an objective lens installation hole.
- a conventional optical disk drive comprises a swing arm 21 installed on a base 10 to be pivotable in a direction S, an actuator 23 providing a rotational driving force for the swing arm 21 , a slider 25 installed at the end portion of the swing arm 21 so as to move along the track of an optical disk 1 while floating on the optical disk 1 due to a dynamic air pressure, and an optical head 30 installed at the slider 25 and provided with an objective lens 31 forming an optical spot on the optical disk 1 and coils changing a magnetic field, so as to reproduce information optically.
- the optical head 30 of the conventional optical disk drive includes the objective lens 31 installed at the slider 25 converging an incident laser beam onto the optical disk 1 , and coils 35 installed horizontally at a side of the slider 25 so as to be positioned between the objective lens 31 and the optical disk 1 .
- the coils 35 are composed of a pair of coils wound in directions opposite to each other, and information is recorded on the optical disk 1 with the aid of a horizontal magnetic field produced according to the flow direction of a current applied to the coils 35 in order to guide the positioning of the beam.
- the objective lens 31 when the objective lens 31 is bonded to the slider 25 in a state in which the objective lens 31 only partially lies on the upper surface of the slider 25 , there is a high possibility that the objective lens 31 is attached to be skew as an adhesive solidifies, and therefore, is disposed to be out of alignment with the optical axis or at a slant with respect to the optical axis.
- an object of the present invention to provide an air bearing slider for an optical disk drive so that the deviation of an objective lens from the optical axis and the undesired slant of the objective lens can be minimized, and further so that dust can be prevented from accumulating in an objective lens installation hole.
- an air-bearing slider for an optical disk drive recording/reproducing information onto/from an optical disk while floating and moving at a predetermined height from the rotatably installed optical disk due to a dynamic air pressure including: a slider main body having an objective lens installation hole formed through the slider main body so that an objective lens can be installed, and an opening formed through the slider main body at one side portion of the objective lens installation hole, so that air flow flowing under the slider main body can flow out through the opening via the objective lens installation hole when the slider is caused to float by a dynamic air pressure.
- FIG. 1 is a schematic plan view illustrating a conventional swing-arm type optical disk drive
- FIG. 2 is a schematic sectional view illustrating an optical head of the optical disk drive shown in FIG. 1 ;
- FIG. 3 is a schematic bottom view shown from the perspective in the direction indicated by line III—III of FIG. 2 ;
- FIG. 4 is a schematic perspective view illustrating an air-bearing slider for an optical disk drive according to one embodiment of the present invention
- FIG. 5 is a plan view of the air-bearing slider shown in FIG. 4 ;
- FIG. 6 is a bottom view of the air-bearing slider shown in FIG. 4 ;
- FIG. 7 is a schematic plan view illustrating an air-bearing slider for an optical disk drive according to another embodiment of the present invention.
- FIG. 8 is a schematic sectional view illustrating an example of installation of an objective lens at an air-bearing slider according to an embodiment of the present invention.
- FIG. 9A illustrates an objective lens installation hole in an air-bearing slider according to another embodiment of the present invention.
- FIG. 9B illustrates an objective lens installation hole in an air-bearing slider according to another embodiment of the present invention.
- an air-bearing slider for an optical disk drive includes a slider main body 60 on which an objective lens 50 is installed, and an air-bearing surface 65 formed at one surface of the slider main body 60 , i.e., a surface facing an optical disk 1 (FIG. 1 ).
- the air-bearing slider is provided at a swing-arm type optical disk drive as shown in FIG. 1 , and records information onto an optical disk or reproduces information from the optical disk while floating at a predetermined height from the rotatably installed optical disk due to a dynamic air pressure, and moves over the optical disk.
- the slider main body 60 has an objective lens installation hole 61 which is formed through the upper and lower surfaces of the slider main body 60 in which the objective lens 50 may be installed thereon, and an opening 63 provided between one side portion of the objective lens installation hole 61 and one end of the slider main body 60 .
- the objective lens 50 is installed over the objective lens installation hole 61 by bonding.
- a bonding portion 61 a to which the objective lens 50 is bonded is provided around the periphery of the objective lens installation hole 61 except at the opening 63 , so that the objective lens 50 can be stably bonded over the objective lens installation hole 61 .
- the opening 63 is provided between the objective lens installation hole 61 and the rear end of the slider main body 60 , as illustrated in FIG. 5 , with the front end shown as A, and the rear end shown as A′.
- the front and rear portions of the slider main body 60 are designated with respect to the rotation direction of the optical disk M such that a line extending from the front portion to the rear portion is substantially parallel to the rotation direction of the optical disk.
- segment A-A′ is parallel to the relative movement direction N of the slider main body 60 with respect to the rotation direction of the optical disk M.
- the rotational direction of the optical disk M is defined herein as a line perpendicular to the radial direction of the optical disk at the point at which the slider main body is positioned directly above the optical disk.
- the opening 63 is formed to communicate with the objective lens installation hole 61 and to have a predetermined length.
- an angle ⁇ is defined between a segment OP, passing through one end (P) of the opening 63 which meets the objective lens installation hole 61 , and extending at its opposite end through the center point (O) of the objective lens installation hole 61 , and a segment B-B′, which is substantially perpendicular to the relative movement direction (N direction) of the slider main body 60 with respect to the rotation direction M of the optical disk and passes through the center point (O) of the objective lens installation hole 61 .
- This angle ⁇ is preferably satisfied by the following Formula (1): 0° ⁇ 90°. (1)
- a bonding portion as illustrated by the shaded region is less than a half circle, and only the upper portion of the objective lens 50 with respect to line B-B′ in FIG. 5 is bonded. Therefore, when an adhesive is solidified at the bonded portion, which is unsymmetrical with respect to line B-B′, there is a possibility in that the objective lens is installed in an undesirably sloped fashion. In contrast, when the angle ⁇ is ⁇ >0°, the bonded portion extends to a section below the line B-B′, and supports the objective lens 50 such as to prevent undesirable sloping.
- the angle ⁇ is 0° ⁇ 90°, thus allowing an opening 63 to be formed, dust flowing in the objective lens installation hole 61 can be prevented from accumulating on the surface of the objective lens 50 . Therefore, it is preferable that the angle ⁇ satisfies the conditions of Formula (1).
- Formula (1) expresses a theoretical case, and, in an actual case, it is preferable that the angle ⁇ satisfies the following Formula (2) provided below so as to ensure a sufficient bonding area and enough passage to discharge dust: 10° ⁇ 80°.
- an air-bearing slider according to another embodiment of the present invention includes a slider main body 70 having an objective lens installation hole 71 and an opening 73 which has a structure similar to that described above, and is further characterized in that the objective lens installation hole 71 is positioned to be closer to the rear end side (A′) in the relative movement direction N of the slider main body 70 with respect to the rotation direction M of the optical disk.
- the length of the opening 73 is short, there is an advantage in that the slider main body 70 can be easily manufactured.
- an objective lens 50 may be inserted into and installed in an objective lens installation hole 61 .
- the sectional shape of the objective lens installation hole 61 may be in the shape of a pentagon, hexagon, or the like other than a circle as shown in FIGS. 5 and 6 .
- the objective lens installation hole is provided in the slider main body, and the bonding surface of the objective lens occupies more than a half the circumference of the objective lens installation hole, errors in the optical axis and horizontal position alignment of the objective lens can be minimized.
- dust can be prevented from accumulating on an installed objective lens by providing an opening at the slider main body, there is an advantage in that the performance of the lens can be prevented from deteriorating due to contamination.
Abstract
Description
0°<θ<90°. (1)
10°<θ<80°. (2)
Claims (14)
0E<θ<90E.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR00-40982 | 2000-07-18 | ||
KR1020000040982A KR100716945B1 (en) | 2000-07-18 | 2000-07-18 | Flying air bearing slider for optical disk drive |
Publications (2)
Publication Number | Publication Date |
---|---|
US20020018441A1 US20020018441A1 (en) | 2002-02-14 |
US6847606B2 true US6847606B2 (en) | 2005-01-25 |
Family
ID=36592743
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US09/835,294 Expired - Fee Related US6847606B2 (en) | 2000-07-18 | 2001-04-17 | Air-bearing slider for optical disk drive |
Country Status (5)
Country | Link |
---|---|
US (1) | US6847606B2 (en) |
JP (1) | JP3895561B2 (en) |
KR (1) | KR100716945B1 (en) |
CN (1) | CN1162860C (en) |
TW (1) | TWI234143B (en) |
Citations (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5124961A (en) * | 1989-12-28 | 1992-06-23 | Fuji Xerox Co., Ltd. | Floating head for use with a recording apparatus of magneto-optical memory device |
US5970038A (en) * | 1997-06-20 | 1999-10-19 | Seagate Technology, Inc. | Reduction of mesa fly height modulation due to media asperities in magneto-optic drives |
US6075673A (en) * | 1997-05-05 | 2000-06-13 | Read-Rite Corporation | Composite slider design |
US6130779A (en) * | 1998-07-06 | 2000-10-10 | Read-Rite Corporation | Near field magneto-optical head made using wafer processing techniques |
US6178157B1 (en) * | 1996-04-15 | 2001-01-23 | Digital Papyrus Corporation | Flying head with adjustable actuator load |
US6181673B1 (en) * | 1996-07-30 | 2001-01-30 | Read-Rite Corporation | Slider design |
US6275467B1 (en) * | 1997-07-23 | 2001-08-14 | Seagate Technology Llc | Positive pressure optical slider having trailing end side pads |
US6320841B1 (en) * | 1998-10-07 | 2001-11-20 | Sony Corporation | Slider for optical head |
US6434088B1 (en) * | 1996-10-07 | 2002-08-13 | Hitachi Maxell, Ltd. | Recording and reproducing apparatus having a magneto-optical head with an objective lens and laser-beam-permeable member |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH04141835A (en) * | 1990-10-02 | 1992-05-15 | Matsushita Electric Ind Co Ltd | Work method for floating type optical head and its slider |
JPH117657A (en) * | 1997-04-21 | 1999-01-12 | Hitachi Maxell Ltd | Optical recording medium, optical head and optical recording device |
JPH1173682A (en) * | 1997-08-27 | 1999-03-16 | Hitachi Maxell Ltd | Optical recording medium, optical head and optical recorder |
JP2000149312A (en) * | 1998-11-13 | 2000-05-30 | Sony Corp | Optical disk device and method of mounting optical lens |
JP3926049B2 (en) * | 1998-11-19 | 2007-06-06 | 日本電気株式会社 | Recording / reproducing head of magneto-optical recording apparatus, supporting mechanism and positioning mechanism thereof |
-
2000
- 2000-07-18 KR KR1020000040982A patent/KR100716945B1/en not_active IP Right Cessation
-
2001
- 2001-03-13 TW TW090105878A patent/TWI234143B/en not_active IP Right Cessation
- 2001-03-21 CN CNB011118342A patent/CN1162860C/en not_active Expired - Fee Related
- 2001-04-17 US US09/835,294 patent/US6847606B2/en not_active Expired - Fee Related
- 2001-07-04 JP JP2001204103A patent/JP3895561B2/en not_active Expired - Fee Related
Patent Citations (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5124961A (en) * | 1989-12-28 | 1992-06-23 | Fuji Xerox Co., Ltd. | Floating head for use with a recording apparatus of magneto-optical memory device |
US6178157B1 (en) * | 1996-04-15 | 2001-01-23 | Digital Papyrus Corporation | Flying head with adjustable actuator load |
US6181673B1 (en) * | 1996-07-30 | 2001-01-30 | Read-Rite Corporation | Slider design |
US6434088B1 (en) * | 1996-10-07 | 2002-08-13 | Hitachi Maxell, Ltd. | Recording and reproducing apparatus having a magneto-optical head with an objective lens and laser-beam-permeable member |
US6075673A (en) * | 1997-05-05 | 2000-06-13 | Read-Rite Corporation | Composite slider design |
US5970038A (en) * | 1997-06-20 | 1999-10-19 | Seagate Technology, Inc. | Reduction of mesa fly height modulation due to media asperities in magneto-optic drives |
US6275467B1 (en) * | 1997-07-23 | 2001-08-14 | Seagate Technology Llc | Positive pressure optical slider having trailing end side pads |
US6130779A (en) * | 1998-07-06 | 2000-10-10 | Read-Rite Corporation | Near field magneto-optical head made using wafer processing techniques |
US6320841B1 (en) * | 1998-10-07 | 2001-11-20 | Sony Corporation | Slider for optical head |
Also Published As
Publication number | Publication date |
---|---|
CN1334566A (en) | 2002-02-06 |
US20020018441A1 (en) | 2002-02-14 |
TWI234143B (en) | 2005-06-11 |
KR100716945B1 (en) | 2007-05-14 |
JP3895561B2 (en) | 2007-03-22 |
CN1162860C (en) | 2004-08-18 |
JP2002056553A (en) | 2002-02-22 |
KR20020007600A (en) | 2002-01-29 |
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Legal Events
Date | Code | Title | Description |
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AS | Assignment |
Owner name: SAMSUNG ELECTRONICS CO., LTD., KOREA, REPUBLIC OF Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:YEON, CHEOL-SUNG;JANG, DONG-SEOB;JUN, GYU-CHAN;AND OTHERS;REEL/FRAME:011972/0497 Effective date: 20010619 |
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Year of fee payment: 4 |
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Year of fee payment: 8 |
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REMI | Maintenance fee reminder mailed | ||
LAPS | Lapse for failure to pay maintenance fees | ||
STCH | Information on status: patent discontinuation |
Free format text: PATENT EXPIRED DUE TO NONPAYMENT OF MAINTENANCE FEES UNDER 37 CFR 1.362 |
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FP | Lapsed due to failure to pay maintenance fee |
Effective date: 20170125 |